Re: Calculus`FourierTransform`
- To: mathgroup@smc.vnet.net
- Subject: [mg11677] Re: Calculus`FourierTransform`
- From: "Stephen P Luttrell" <luttrell@signal.dra.hmg.gb>
- Date: Sat, 21 Mar 1998 18:35:13 -0500
- Organization: Defence Evaluation and Research Agency
- References: <6emdjm$nno@smc.vnet.net> <6esone$68d@smc.vnet.net>
>... >The fourier package seems to be very scrappy. I had to jump through >hoops to get the FT of a rectangular pulse to come out as Sin(x)/x, and >when I tried to get it in terms of T (pulse width) it just dies. It >only gives me a valid answer if I set T=1 or similar. >... The following code: Needs["Calculus`FourierTransform`"]; Needs["Calculus`DiracDelta`"]; FourierTransform[UnitStep[x+1]-UnitStep[x-1],x,k] yields the output: (2*Sin[k])/k ========================================== Stephen P Luttrell luttrell@signal.dra.hmg.gb Adaptive Systems Theory 01684-894046 (phone) Room EX21, DERA 01684-894384 (fax) Malvern, Worcs, WR14 3PS, U.K. http://www.dra.hmg.gb/cis5pip/Welcome.html